Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c9c792581d2570…

MALICIOUS

PDF

39.0 KB Created: 2021-05-25 08:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 939accd39012e7e0ce59dcbd4303ea7d SHA-1: b22339aca413438d73d466017cdcf70c6cd18447 SHA-256: 45c9c792581d25705bd5fe7d9048bf258e4f8a900c6244bdbf9932402efaeb6c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of "free Tiktok Followers" and "game hacks". The embedded URLs point to domains commonly associated with phishing and scamming operations. While no scripts were directly extracted, the PDF structure and heuristics indicate a malicious redirector workflow, likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/835599320/free-tiktok-followers-game-hack In PDF document text
    • http://energyline.co/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://energyline.co/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://energyline.co/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://energyline.co/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://energyline.co/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003241.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3241 26708 bytes
SHA-256: 220c23564b3741193af0827f50e093fc745b1a24b822610a6201516b01257bad
font_01_sfnt_off00006eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAC 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 17692 bytes
SHA-256: ba2215a0f2290c6faad19fe6968ba231152e54b1cb241ca137cf69db350684c8

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